Kenwood C-v751 Service Manual
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STEREO INTEGRATED AMPLIFIER/TUNERC-V751SERVICE MANUAL © 1999-8/B51-5566-00 (K/K) 1992 70% Caution : No connection of ground line if disassemble the unit. Please connect the ground line on rear panel, PCBs, Chassis and some others. ON/STANDBY PHONES INPUTTAPE 2 / MONITOR VOLUME CONTROL DOWN UP DIGITAL REC TIMER MODERDS PTY DISPLAY CLOCK TA/NEWS DTS A.MEMO AUTO BAND TUNING PTY SELECT LISTEN MODEMULTI.CONTROL LEVEL OPEN/CLOSE SET UP SOUND INPUT MODE DIGITALCIRCLE SURROUND TIMER SET ANTENNAAM FM 75W GND...
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Batteries (R06/AA) (6) FM indoor antenna (1) (T90-0841-05)AM loop antenna (1) (T90-0833-05) Loop antenna stand (1)Remote control assy GRC-700 (1) (A70-1300-05) Battery cover(A09-1139-08) ENTERVOLUMEUP DOWN CONFIRM ON/STANDBY CONTRASTBacklighteditmoviemusicsoundlistenmodeSleep C-V7512 CONTENTS / ACCESSORIES DISASSEMBLY FOR REPAIR CONTENTS / ACCESSORIES .................................. 2 DISASSEMBLY FOR REPAIR ....................................2 CIRCUIT DESCRIPTION...
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C-V751 3 CIRCUIT DESCRIPTION DESTIN- ATIONu-COM DESTINATIONBANDRECEIVING FREQUENCY RANGECHANNEL SPACEIF PLLTUNER SW TSW4 TSW3 TSW2 TSW1 (22) (21) (20) (19) E/XE3 RDSFM AM87.5MHz~108.0MHz 531kHz~1602kHz50kHz 9kHz+10.7MHz +450kHz25kHz 9kHz0101 TE4 LW RDSFM MW LW87.5MHz~108.0MHz 531kHz~1602kHz 153kHz~279kHz50kHz 9kHz 9kHz+10.7MHz +450kHz +450kHz25kHz 9kHz 9kHz0110 FREQUENCY FREQUENCY M.ch E/X TM.ch E/X T 1 FM 98.0MHz FM 98.0MHz 21 AM 531kHz LW 270kHz 2 FM 87.5MHz FM 87.5MHz 22 FM...
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C-V7514 CIRCUIT DESCRIPTION Pin No. Pin Name I/O DescriptionACTIVE HL 1 AMUTE O Audio muting control. Mute:ON Mute:OFF2 POWER O Power ON/OFF relay control. Power:ON Power:OFF3 POWER O Power amplifier relay control. Power:ON Power:OFF4 F RLY O Front speaker relay control. Relay:ON Relay:OFF5 C RLY O Relay control of center,surround and SW woofer. Relay:ON Relay:OFF6 S RLY O Rear speaker relay control. Mute:ON Mute:OFF7 +3dB O +3dB attenuation control for super woofer. ATT:ON ATT:OFF8 20dB O +20dB...
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5 C-V751 CIRCUIT DESCRIPTION KS1(15pin) KS2(16pin) KS3(17pin) KS4(18pin) KS5(19pin) KS6(20pin) KS7(21pin) TAPE2 MONITORINPUT AUTO -*TA/NEWS/ INFO.SRS - -INPUTBANDLEVEL *PTY DTS - TIMER MODETIMER SETAUTO MEMORYLEVEL *DISPLAY DOLBY.DINPUT MODE TUNING TUNING D.REC MODE SET UPTIMER CLOCKSOUND Pin No. Pin Name I/O DescriptionACTIVE HL 65 ERR I Detection port of error. ERROR66 AC3 I Detection port of dolby digital.67 FREQ1 I Detection port 1 of sampling frequency.68 FREQ0 I Detection port 0 of sampling...
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6C-V751 CIRCUIT DESCRIPTION INPUTS1 L/R VIDEO1 RECS2 L/R VIDEO2 RECS3 L/R MD TAPE1S4 L/R INPUT -6dBS5 L/R INPUT 0dBS6 L/R INPUT -3dBS7 L/R TAPE2 ONS8 L/R TAPE2 OFF TUNERCD MD/TAPE1 X DVD/DVD6ch VIDEO1 XVIDEO2 X INPUT LEVEL 0dBX X INPUT LEVEL -3dBXX INPUT LEVEL -6dB XX TAPE2/MONI ON X TAPE2/MONI OFFX INPUTS1 L R S2 L RS3 L RS4 L RS5 L RS6 L RS7 L RS8 L R TUNERXXXXXXXX X X X CD XXX XXX X X X X MD/TAPE1 X XXXX XX X X X DVD/DVD6chXXXXXXXX X XX VIDEO1 XXXXXX XXX X VIDEO2 X X XX XX X X X X REC...
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7 C-V751 ADJUSTMENT No. ITEMINPUT SETTING OUTPUT SETTINGTUNER/AMP SETTINGALIGNMENT POINTSALIGN FOR FIG. SELECTOR : FM 1DISCRIMINATOR DISTORTION(A) 98.0MHz MONO 1kHz, ±40kHz dev 60dBu (ANT INPUT)Connect a DC voltmeter to CN2 on tuner PCB.MONO 98.0MHzL31 (T) L4(E,X)0V (a) TUNED LEVEL (E,X type only)(C) 98.0MHz MONO 1kHz, ±40kHz dev 20dBu ANT INPUTMONO 98.0MHzVR1Adjust VR1 and stop at the point where FL (TUNED) goes ON.(a) (B) -L32 (T) L5(E,X)Minimum distrotion 3 2 DISTORTION (STEREO)(C) 98.0MHz...
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PLAYJ1 VIDEO1 J3 J2 J7J7 J7 J4 RchLch J5 PRE OUT 1 2 Lch1 Rch2 Lch5 Rch6 Lch1 Rch2 Lch3 Rch4 Lch5 Rch6Lch1 Rch2 LSch3 RSch4 Cch5 SWch6 Lch 1 Rch2 3 4 5 6 Rch43 Lch RchLch 43 REC VIDEO1 PLAY CD PLAY VIDEO2 MD/TAPE1 REC MD/TAPE1 PLAY TAPE2/MONITORDVD/6ch INPUT SWchCch RSchLSch J6 CONNECT WITH POWER AMPLIFIRECN1 E3WH3 E4 HEADPHONES J8CN13 CN6 CN5 CN12 E2WH4 E1 J3 SYSTEM J2MONITOR OUT REC VIDEO1 VIDEO1 IN VIDEO2 IN 6ch IN 2 1 CONTROL J4 J1 DVD COAXIAL IN A1 CN1WH1 E1 WH2 CN1CN2CN3 CN1CN2 CN4CN4 WH2 E2CN3...
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9 ACEBD 2 1 3 5 7 4 6 Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view ) Q2 Q1 D1 Q11 Q10IC3 D7D16 D13 D11Q9 Q8 Q12 Q6 Q3Q4D8 Q14Q15 Q7 R75C84 C92 C93C88 R89 C91C89 C90 C35 C87 R32/W60 R29C8C58 C56 C57 C61 C60 C36 R43 R48 R66 R63 R62 R69 R67 R68 R18R19 R34 R33 R20 C69 C63 W85 W59 W81W86 C81 C5 R84 C6 C1C2 C3 C82 C78 C75 C11 C12 C39 C25C26 C24 C42 C41 C30 C22 C52 C45 C47 C50 C51 C18 C20C43 C44R55 R79 R56 R53 R54 R57 R51 R52 R49 R42 R80R82 R11 R14 W56...
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10 FGIHJ 2 1 3 5 7 4 6 PC BOARD (Component side view ) 10 1 10 6 1 TAPE2 INPUT POWER T.CLOCK T.MODET.SET D.REC SETUP DISPPTY TA/NEWS/INFOSOUND MODEINPUT 61 GND +5V VOLUME CONTROL DOOR R1R16 R12 R13 R14 W36 W37 W35 W11 W7 W14 W4 W20 W31W27W26 W30 W28 W29W25W24 W5W3 W12 W34 W10 W23 W22 W9 W2 W8 W6W18 W21 W16W19 125 AUTO A.MEMO DOLBY.D SRS BANDMODELEVEL CONT TUNING R11 C1 R15 W32 R32 R31 R34 R2 R35 R3 R5 R4W38 W13 R25R24 C2R29 R28 R91 R21 R94 R93 R92 W41 C4R52 R51 R69 C5C3 R76 R70 R71 R72 R73 R74 C9 C12...